'use strict';
|
// https://github.com/tc39/proposal-iterator-helpers
|
var call = require('../internals/function-call');
|
var anObject = require('../internals/an-object');
|
var getIteratorDirect = require('../internals/get-iterator-direct');
|
var createAsyncIteratorProxy = require('../internals/async-iterator-create-proxy');
|
var createIterResultObject = require('../internals/create-iter-result-object');
|
|
var AsyncIteratorProxy = createAsyncIteratorProxy(function (Promise) {
|
var state = this;
|
var iterator = state.iterator;
|
|
return Promise.resolve(anObject(call(state.next, iterator))).then(function (step) {
|
if (anObject(step).done) {
|
state.done = true;
|
return createIterResultObject(undefined, true);
|
}
|
return createIterResultObject([state.index++, step.value], false);
|
}).then(null, function (error) {
|
state.done = true;
|
throw error;
|
});
|
});
|
|
module.exports = function indexed() {
|
return new AsyncIteratorProxy(getIteratorDirect(this), {
|
index: 0
|
});
|
};
|
